- L)s.TY-SEVENTH oouonnss. sm. Iv. ca. 178. 1923. 1397
instruction; for maintenance, repair, stora e and o ration of air- mmf? °P°¤*'**°¤» ships, war balloons, and other aerial maghines, iiitluding instru- cmsmm°u’m` ments, materials, gas plants, hangars, and repair shops, and appliances of every sort_ and description necessary for the operation, construction, or equipment of all types of aircraft, and all necessary spare parts_and equipment connected therewith and the establishment of landing and take-off runways; for purchase of supplies L°¤di¤€» °°°-» ¤"¤¤· for securing, developing, printing, and reproducing photographs in ways` connection with aerial photography; improvement, equipment, maintenance, and operation of plants for testin and experimental work, and procuring and introducing water, electric light and power, gas and sewerage, including maintenance, operation, and repair of such utilities at such plants; for the acquisition of land or inter- ugdlm 8** P¤‘°¤¤¤- est in land by purchase, lease, or condemnation where necessary l to explore for, procure, or reserve helium gas, and also for the purchase, manufacture, construction, maintenance, and operation of plants for the production thereof and experimentation therewith; salaries and wages of civilian employees as may be necessary, and _,,§’““°“ °mP'°Y°°S· payment of their traveling and other necessary expenses as author- ` ized by existing law; transportation of materials in connection with consolidation of Air Service activities; experimental investigation and purchase and development of new types of aircraft, accessories thereto, and aviation engines, including patents and other rights thereto, and plans, drawings, and specifications thereof; for the ,mP‘f'§b,§°·0,"{f,,'§;,§’}‘§ purchase, manufacture, and construction of airships, balloons, and ¤*°· i I other aerial machines, including instruments, gas plants, hangars, and repair shops, and appliances of every sort and description (necessary for the operation, construction, or equipment of all types of aircraft, and all necewary s are parts and equipment connected therewith; for the marldng of military airways where the purchase of m,,,,_,",“,_yS_ land is not involved; for the purchase, manufacture, a.nd issue of special clothing, wearing apparel, and similar equipment for avia— . tion purposes; for all necessary expenses connected with the sale _ or disposal of surplus or obsolete aeronautical equipment, and the ,,qE{§*,§,°§'§‘,l,§,L_’“'p1“s rental of buildings, and other facilities for the handling or storage of such equipment; for the services of such consulting engineers at cuasuiaugsaginsm, experimental stations of the Air Service as the Secretary of War ""‘ may deem necessary, including necessary traveling expenses; purchase of special apparatus and appliances, repairs and replacements of same used in connection with special scientific medical research in the Air Service; for maintenance and ofperation of such Air Service printing plants outside of the District o Columbia as may be authorized in accordance with law; for publications, station libraries, hlggimpsi vmw suvspecial furniture, supplies and equipment for offices, shops, and D ’ ` laboratories; for spccia services, including the salvaging of wrecked aircraft. $12.4%.000: Provided, That not to exceed $2,500,000 from Hligzigshtsf d _ this appropriation may be expended for pay and expenses of civilian named pu§’p.,,,,§' wg' employees other than those employed in experimental and research work: not exceeding $500.000 may be expended for experimentation. r·on<ervation. and production of helium; not exceeding $3.000,- 000 may be expended for experimental and research work with airplanes or lighter-than-air craft and their equipment, including Airpms bmbm the pay of necessary civilian employees: Provided, That not less than mean. g ss=sn.o<>o of this amount shall be used for continuation of airplane bombing tests against obsolete naval craft; not exceeding $500,000 may be expended for the production of lighter·than-air equipment: and not exceeding $300.000 may be expended for improvement of stations. hangarsi and gas plants for the Regular Army and for such other markings and fuel supply stations and temporary shelter as may be necessary; Pl’O?,’2'd€(l fuz·f}ze1·. That not less than $2,646.-
